Have you heard of Audio-Visual Entrainment?
Audio–visual entrainment (AVE) uses light and sound to stimulate neurotransmitters, increase cerebral blood flow, produce deep autonomic calming, and excite and reestablish neural networks. Per this medical article in ScienceDirect, clinical studies show AVE helping the treatment of attention deficit hyperactivity disorder (ADHD), worry, depression, anxiety, cognitive decline, balance and memory in seniors, concussion, post-traumatic stress disorder (PTSD), seasonal affective disorder (SAD), and pain remediation. [...]